US 12,555,770 B2 · Solid electrolyte film for sulfide-based all-solid-state battery batteries

Abstract

A solid electrolyte film for sulfide-based all-solid-state batteries, and more particularly a composition of a solid electrolyte, a binder, and a solvent used to manufacture a solid electrolyte film for sulfide-based all-solid-state batteries that is thin and has high ion conductivity. In particular, a solid electrolyte film composition for sulfide-based all-solid-state batteries including a solvent having a dielectric constant of x (1.5<x<3.0). The thickness of a solid electrolyte film for sulfide-based all-solid-state batteries manufactured using the solid electrolyte film composition is 60 μm or less, and the solid electrolyte film is capable of being stably used for at least 1000 hours or more, and up to 2000 hours, based on the evaluation of Li plating and stripping.

Claims13

Dependent claims

A method for preparing a sulfide-based all-solid-state battery comprising:

(a) preparing a sulfide-based solid electrolyte film by:
(1) providing a mixture comprising (i) a sulfide-based solid electrolyte material;
(ii) a polymer binder comprising C and H therein but not comprising any of O, N, and F therein;
and (iii) a solvent having a dielectric constant of x, wherein 1.0<x<3.1;
and
(2) processing the mixture using a wet-type manufacturing process to produce the sulfide-based solid electrolyte film, wherein the sulfide-based solid electrolyte film is flexible;
and
(b) interposing the sulfide-based solid electrolyte film between a positive electrode and a negative electrode,
wherein the polymer binder is SEBS,
wherein the sulfide-based solid electrolyte material comprises Li6PS5,
wherein the sulfide-based solid electrolyte material has an average particle diameter of 0.1 μm to 50 μm, and
wherein the sulfide-based solid electrolyte film has a thickness of 60 m or less.

9 more elements

Dependencies are inferred from the claim text.

Solid electrolyte film for sulfide-based all-solid-state battery batteries

Life of this patent

Solid electrolyte film for sulfide-based all-solid-state battery batteries

Life of this patent

Abstract

Claims13